微网接入对配电网供电可靠性影响分析  

Analysis on the effect of micro-grid access to the power supply reliability of distribution network

作　　者：赵航宇[1] 赵洪山[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《电测与仪表》2016年第8期7-12,共6页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51077053)

摘　　要：分布式电源越来越多的被接入到配电网中,在改变配电网运行方式的同时也给配电网的可靠性评估方法带来影响。提出一种含微网接入的配电网可靠性指标计算方法。首先以小时为功率变化基本单位,建立风机、光伏、储能装置输出功率的时序模型,并制定储能装置的充放电策略。对元件发生故障后的系统进行区域划分,根据区域划分结果和孤岛内负荷优选模型确定各个负荷点的停电时间。在此基础上,通过蒙特卡洛模拟法计算可靠性指标。以改进的IEEE RBTS BUS6系统为算例,计算了微网接入前后的各项可靠性指标,分析了微网的接入在改善配电网供电可靠性方面的作用。More and more distributed generations will be embedded into the distribution network. This will impact the operation mode of distribution network,and the reliability evaluation method will change at the same time. This paper presents a reliability index calculation method for distribution network connected with micro-grid. Firstly,assuming the basic unit for power changes is an hour,the paper establishes the sequence model of wind turbine generator,photovoltaic generator,and energy storage device. The energy storage device charge-discharge strategy is also formulated.According to the differences of each unit affected by the fault,the network will be divided into different types of areas,and then the outage time of each load point is determined by the result of area division and load optimization in the island. On this basis,the reliability indices are calculated by Monte Carlo simulation. Taking the improved IEEE RBTS BUS6 network system for example,the indices before and after connecting micro-grid are calculated,thus the role that micro- grid connection can play in the improvement of distribution system reliability is verified.

关 键 词：配电网 可靠性 微网 分布式电源 储能装置 

分 类 号：TM715[电气工程—电力系统及自动化]